Arm for a lighting fixture



FIG. 1 is a front view of the arm for a lighting fixture;

FIG. 2 is a right side view of the arm for a lighting fixture, with the left side view being a mirror image thereof;

FIG. 3 is a rear view of the arm for a lighting fixture;

FIG. 4 is a top view of the arm for a lighting fixture element; and,

FIG. 5 is a bottom view of the arm for a lighting fixture element.

The stippling shown in the Figures is for shading purposes only, and does not form part of the claimed design. 

The ornamental design for an arm for a lighting fixture, as shown and described. 